BugID: #05513

==1726==ERROR: AddressSanitizer: SEGV on unknown address 0x7ffb73152c40 (pc 0x0000028a9dac sp 0x7fffa4164950 bp 0x7fffa41649a0 T0)
    #0 0x28a9dab in geniusiq_state::gfx_idx_w(address_space&, unsigned int, unsigned short, unsigned short) /home/notroot/trunk/src/mess/drivers/geniusiq.c:424
    #1 0x566ceaf in delegate_base<void, address_space&, unsigned int, unsigned short, unsigned short, _noparam, _noparam, _noparam, _noparam, _noparam, _noparam, _noparam, _noparam>::operator()(address_space&, unsigned int, unsigned short, unsigned short) const /home/notroot/trunk/src/emu/delegate.h:652
    #2 0x566ceaf in handler_entry_write::write16(address_space&, unsigned int, unsigned short, unsigned short) const /home/notroot/trunk/src/emu/memory.c:481
    #3 0x566ceaf in address_space_specific<unsigned short, (endianness_t)1, true>::write_native(unsigned int, unsigned short, unsigned short) /home/notroot/trunk/src/emu/memory.c:1182
    #4 0x4295f27 in delegate_base<void, unsigned int, unsigned int, _noparam, _noparam, _noparam, _noparam, _noparam, _noparam, _noparam, _noparam, _noparam, _noparam>::operator()(unsigned int, unsigned int) const /home/notroot/trunk/src/emu/delegate.h:650
    #5 0x4295f27 in m68ki_write_32_fc(m68000_base_device*, unsigned int, unsigned int, unsigned int) /home/notroot/trunk/src/emu/cpu/m68000/m68kcpu.h:826
    #6 0x4295f27 in m68ki_push_32(m68000_base_device*, unsigned int) /home/notroot/trunk/src/emu/cpu/m68000/m68kcpu.h:1041
    #7 0x4295f27 in m68ki_stack_frame_3word(m68000_base_device*, unsigned int, unsigned int) /home/notroot/trunk/src/emu/cpu/m68000/m68kcpu.h:1227
    #8 0x4295f27 in m68ki_stack_frame_0000(m68000_base_device*, unsigned int, unsigned int, unsigned int) /home/notroot/trunk/src/emu/cpu/m68000/m68kcpu.h:1239
    #9 0x3fc16b7 in m68ki_exception_1111(m68000_base_device*) /home/notroot/trunk/src/emu/cpu/m68000/m68kcpu.h:1598
    #10 0x3fc16b7 in m68000_base_device_ops::m68k_op_1111(m68000_base_device*) /home/notroot/trunk/obj/sdl64d/emu/cpu/m68000/m68kops.c:20
    #11 0x3fb57cd in m68000_base_device::cpu_execute() /home/notroot/trunk/src/emu/cpu/m68000/m68kcpu.c:855
    #12 0x56e3480 in device_execute_interface::run() /home/notroot/trunk/src/emu/diexec.h:187
    #13 0x56e3480 in device_scheduler::timeslice() /home/notroot/trunk/src/emu/schedule.c:474
    #14 0x55fd2f1 in running_machine::run(bool) /home/notroot/trunk/src/emu/machine.c:378
    #15 0x55f46d7 in mame_execute(emu_options&, osd_interface&) /home/notroot/trunk/src/emu/mame.c:194
    #16 0x53f5518 in cli_frontend::execute(int, char**) /home/notroot/trunk/src/emu/clifront.c:237
    #17 0x2c0fba5 in main /home/notroot/trunk/src/osd/sdl/sdlmain.c:379
    #18 0x7ffb14348de4 in __libc_start_main /build/buildd/eglibc-2.17/csu/libc-start.c:260
    #19 0xd1cb8c in _start (/home/notroot/trunk/mess64d+0xd1cb8c)